Fluid purifier



1952 c. A. WINSLOW ET AL 2,583,522

FLUID PURIFIER Filed April 27, 1948 INVENTORS CHARLES A. W/NSLOW JOHA/JMEYER Evy/Ma A T TOR/V5 Y fixed positions.

the purifier except the actual magnet elements, the screen 30 is made ofnon-magnetic material, and preferably is of fine mesh. Thus, the screen30 acts not only as a screen to remove nonmagnetic foreign matter fromthe oil as it passes from the inlet to the outlet, but also as a flowcontrol. The fine gauge screen restrains the fluid sufiiciently so thatit passes from the inside chamber 3| to the outside chamber 32 along thefull surface of the screen 33, with the result that the flow tends to bemore'strongly axial and less strongly radial or outward. This actiontends to fiow impurities along with the fluid toward the sump 20| wherethey may be readily blown out during operation by opening the valve 202.Axial flow in the casing thus assuring introduction of the oil into themagnetic field, can be further obtained by substantially equating theforce necessary to fiow the oil through the screen, to the fluid flow inthe system, the actual force depending on the oil pressure and velocityin the system, the total area of the screen openings and the totalresistance to fiow through all the small openings.

The ribs 200 in the cap 20 supports in the center chamber 3| a magnetassembly, shown generally at 40. The assembly 4|] comprises anon-magnetic rod 4|, threaded into the axial tap 25 and steadied againstthe boss 24 by the nut 42. Mounted on the rod 4| are a plurality ofalternately-positioned magnetic elements 43 and non-magnetic spacingmembers 44. A nut 45 and washer 46 on the end of the rod 4| hold theelements 43 and spacers 4'4 in prearranged,

Each individual magnetic element 43 is shaped as shown in Fig. 2-a torusor annulus broken at one end, to form a round, horseshoe magnet with thenorth and south poles separated by a gap 41. When the elements 43 areplaced on the rod 4|, they are disposed so that the poles face in alldifferent directions and provide a substantially uniform field of atleast the radius of the chamber 3|. By using a plurality of magneticelements 43 in the assembly 40, a much stronger and more even field isobtained than can be obtained by using a single bar magnet similarlydisposed. Since the volume of the magnetic field equals or isgreaterthan the volume of the chamber 3|, every ferromagnetic particle passingfrom the inlet l2 to the outlet l8 enters the magnetic field and becomessubject to it at the same time that the fluid momentum is restrainedWithin the limits of the magnetic field by the screen 30.

On operation, the oil fiows through the central inlet I2 into thechamber 3|. The screen 30 .controls its flow, making it substantiallyaxial particles from the oil, and heavy particles are 1 its outer edgeout through the screen 30 into the outer chamber 32 and thence to thevertical outlet I 8, purified of the solidparticles and especially ofthe ferromagnetic particles.

The mounting of both the screen 30 and magnet assembly 40 on the hollowcap 20 renders withdrawal replacement, and cleaning simple.

When the screws 2| are taken out, the purifier may be withdrawn from thehousing. The screen 36 can be pulled out from the cap flange 22, and itand the magnet assembly 40 brushed off, reassembled, and the wholepurifier then put back in the passage 4. It will be understood thataxial direction of fiuid flow and velocity of same causes all materialcollected which is not firmly held by the magnets to be collected in thesump Zlll. It is to be further understood that when the invention isused under pressure that opening of the valve 202 would cause allcollected material not firmly attached to magnets to be blown outthrough the opening 203, thus cleansing the screen 36 and magnets 93, aswell as removing all other collected material in th sump 2U| and chamber3|.

We claim:

1. A magnetic filtering device for flowing fluids comprising anelongated housing having a cylindrical walled chamber therein, an inletopening in one end of the housing co-axial with said chamber, an outletopening from said chamber in the side wall of the housing, a capremovably secured to the opposite end of the housing and having acylindrical flange extending within said chamber, a boss rigidlysupported within said cap in co-axial relation to said inlet opening andsaid cylindrical flange, an elongated magnet assembly disposed withinthe chamber and having one. end thereof removably supported by saidboss, said housing being also provided with an inwardly directed flangesurrounding said inlet opening and provided with an outer frustoconi calwall converging toward said opposite end of the housing and being inco-axial relation to said cylindrical flange, the inner converging endportion of said Wall being of less diameter than the inner surface ofsaid cylindrical fiange, and a cylindrical filter screen having one endthereof removably seated within said cylindrical flange and its oppositeend freely engaged over said frusto-conical wall, whereby said screen isremovable as a unit with said cap and concentrically supported withrespect to said magnet assembly by said frusto-conical wall.

2. The device according to claim 1', wherein said magnet assemblycomprises an elongated non-magnetic rod, having one end thereof threadedinto said boss, and the opposite end thereof freely disposed adjacentthe inner end of said inwardly converging flange, a plurality ofhorseshoe magnets supported on said rod, a plurality of non-magneticspacing members disposed on said rod between said magnets formaintaining same in uniformly spaced relation. and said magnets beingarranged on the rod with their poles facing in different directionsradially of the rod for providing a substantially uniform magnetic fieldabout the magnet assembly and within the screen.

CHARLES A. WINSLOW. JOHN J. MEYER.

REFERENCES CITED The following references are of record the file of thispatent:

UNITED STATES PATENTS Feagin May 7,1946

